5
QuizMultiple Choice

The Energy of Chemical Reactions — Test

Question 5 • 26-27 - C - RUSD Chemistry in the Earth System

Which is the most important factor in determining the state of a substance?

Answer
A
the position of the electrons on the outer valence shells
B
the number of molecules in a substance
C
the size of the atoms in a substance
D
the balance between intermolecular forces and kinetic energy

Explanation

A substance’s state depends mainly on the balance between the attractions among its particles and their kinetic energy. Stronger intermolecular forces tend to hold particles close together, while greater kinetic energy helps them move more freely. Therefore, the correct choice is “the balance between intermolecular forces and kinetic energy.”

AI-written and checked against the verified answer.

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